Coleta, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.2 °F (low) to 58.9 °F (high). Annual precipitation averages 38.9 Inches. Coleta is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.1 °F | 29.2 °F | 1.7 in. |
| February | 15.7 °F | 33.6 °F | 1.93 in. |
| March | 26.2 °F | 45.9 °F | 2.41 in. |
| April | 36.8 °F | 59.9 °F | 3.81 in. |
| May | 48.7 °F | 71.5 °F | 4.97 in. |
| June | 58.6 °F | 80.5 °F | 5.09 in. |
| July | 61.9 °F | 83.2 °F | 4.27 in. |
| August | 59.7 °F | 81.9 °F | 4.2 in. |
| September | 51.3 °F | 76.0 °F | 3.63 in. |
| October | 39.8 °F | 63.0 °F | 2.73 in. |
| November | 28.7 °F | 47.4 °F | 2.2 in. |
| December | 18.3 °F | 34.6 °F | 2.0 in. |
| Annual | 38.2 °F | 58.9 °F | 38.94 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |